NXP Semiconductors LD6836CX4/13H,315

Overview

LD6836CX4/13H,315 from NXP Semiconductors is a 1.3 V fixed-output, 300 mA ultra-low-dropout linear regulator in a 0.4 mm pitch WLCSP4 package (0.76 mm × 0.76 mm × 0.47 mm), featuring 90 mV dropout at full load, 30 µV_RMS output noise (10 Hz–100 kHz), and high-ohmic (3-state) output during disable - designed for power-sensitive mobile interfaces in smartphones and portable media players.

For engineers reviewing the LD6836CX4/13H,315 datasheet, LD6836CX4/13H,315 pinout, LD6836CX4/13H,315 application, or LD6836CX4/13H,315 equivalent, key selection criteria include its 1.3 V output accuracy (±0.5% at +25°C), 55 dB PSRR at 1 kHz, 150 µs startup time, 0.1 µA shutdown quiescent current, and thermal protection up to 160°C - all validated for miniaturized, battery-powered systems requiring stable low-noise biasing.

Technical Context

The LD6836CX4/13H,315 implements a PMOS pass transistor architecture enabling ultra-low dropout (90 mV typical at 300 mA) and high PSRR (−55 dB at 1 kHz). Its enable input (active HIGH, VIH ≥ 1.1 V) controls a high-ohmic output state when disabled, eliminating external discharge circuitry.

It integrates over-temperature shutdown (160°C trigger, 20 K hysteresis), output current limiting (600 mA short-circuit), and ESD protection (10 kV HBM). Input voltage range is 2.3 V to 5.5 V, supporting direct Li-ion/Li-poly battery and multi-rail system integration without intermediate regulation.

Key Specifications

Pinout & Package

LD6836CX4/13H,315 uses a 4-bump Wafer-Level Chip-Scale Package (WLCSP4) with 0.4 mm pitch and footprint 0.76 mm × 0.76 mm. Bumps are arranged in a 2×2 grid; bump A1 is index corner (top-left in transparent top view, solder balls facing down).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with LD6836CX4/13P, LD6836CX4/13H,315 avoids unnecessary discharge current and simplifies layout by eliminating pull-down path; versus LD6836TD/13H, it delivers superior thermal performance (130 vs. 125 K/W) and 10 mV lower dropout in a 60% smaller footprint - critical for next-gen portable devices.

Availability

LD6836CX4/13H,315 is available at Aetrix Electronics and suitable for smartphone power management, portable media player audio subsystems, and GPS navigation device baseband circuits requiring stable component supply with guaranteed long-term availability.

Supply support for LD6836CX4/13H,315 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor company specializing in secure connectivity solutions for automotive, industrial, and consumer applications, with leadership in power management and RF technologies.

The LD6836 series was developed specifically for ultra-miniaturized, battery-powered mobile devices demanding ultra-low-noise, high-efficiency LDO regulation in wafer-level packaging - targeting smartphones, digital cameras, and portable navigation systems.

FAQ

What is the nominal output voltage of the LD6836CX4/13H,315?

The LD6836CX4/13H,315 provides a fixed nominal output voltage of 1.3 V, with initial accuracy of ±0.5% at +25°C and ±4% over the full operating temperature range (−40°C to +85°C). This precision enables reliable powering of 1.3 V logic cores and analog subsystems without external feedback adjustment.

Does the LD6836CX4/13H,315 support active discharge during disable?

No, the LD6836CX4/13H,315 does not provide active discharge. It features a high-ohmic (3-state) output during disable, meaning the OUT pin floats rather than pulling low. For auto-discharge functionality, use the P-suffix variant (e.g., LD6836CX4/13P), which integrates a pull-down transistor.

What is the recommended external capacitance for stable operation of the LD6836CX4/13H,315?

The LD6836CX4/13H,315 requires a minimum 0.7 µF X7R ceramic capacitor on the OUT pin for stability, with 1.0 µF recommended. An input capacitor of the same value is also advised. Equivalent Series Resistance (ESR) must be between 5 mΩ and 500 mΩ to ensure proper loop compensation and transient response.

How does the thermal performance of the LD6836CX4/13H,315 compare to the SOT753 version?

The LD6836CX4/13H,315 has a junction-to-ambient thermal resistance (R_th(j-a)) of 130 K/W, slightly higher than the LD6836TD's 125 K/W due to its smaller WLCSP4 footprint. However, its ultra-low 90 mV dropout reduces power dissipation significantly - e.g., at 300 mA, it dissipates only 27 mW versus ~30 mW for the TD variant - resulting in comparable or lower actual die temperature in most layouts.

Is the LD6836CX4/13H,315 RoHS-compliant and halogen-free?

Yes, the LD6836CX4/13H,315 is Pb-free, RoHS-compliant, and fully halogen- and antimony-free (NXP's "dark green" compliance standard), meeting environmental requirements for consumer electronics and portable devices sold globally.